[Project_owners] Mailing list messages not getting through

[Alex Eng]

I am trying to send an email message to the mailing list for my 
Clippings project on Mozdev, where I am both the list administrator and 
a list subscriber, but my message isn't showing up in the list archives. 
  In the past I have been able to send messages to the mailing list via 
email without problems; my most recent message to the mailing list was 
posted at the beginning of last week.

It seems that only certain messages are  being blocked.  A simple test 
email message with just two short sentences in the message body appeared 
in the mailing list archive (I sent two such test messages today).  But 
a longer email message with multiple sentences and an email signature 
never made it through.

All my email messages are in plain text, ISO-8859-1 encoded, with no 
attachments.  I am not using HTML format.

At least one other mailing list subscriber has reported problems trying 
to email to the same mailing list.  He had tried two different email 
addresses but was still unsuccessful.

The mailing list spam filter hasn't changed at all in the past week. 
Any suggestions on what I should do to troubleshoot further and fix this 
problem would be very much appreciated.